i've posted another one of my older tutorials on my site. again, leaving it there so that i can make modifications/edits as needed and the formatting abilities. this reproduction was in response to several questions on spoofing from another site; but i thought it might service some here as well. for some members, the initial sections will be remedial, as it tries to build a starting foundation. the applied stuff can be found in the last half.
nothing revolutionary here - it's all been said before; my purpose is in the ease of understanding through adequate presentation.
http://droby10.addr.com/tutorial/ip_spoof.html